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Diffstat (limited to 'engines/glk/frotz/processor_maths.cpp')
-rw-r--r-- | engines/glk/frotz/processor_maths.cpp | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/engines/glk/frotz/processor_maths.cpp b/engines/glk/frotz/processor_maths.cpp new file mode 100644 index 0000000000..90e09ca8b9 --- /dev/null +++ b/engines/glk/frotz/processor_maths.cpp @@ -0,0 +1,105 @@ +/* ScummVM - Graphic Adventure Engine + * + * ScummVM is the legal property of its developers, whose names + * are too numerous to list here. Please refer to the COPYRIGHT + * file distributed with this source distribution. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + */ + +#include "glk/frotz/processor.h" + +namespace Gargoyle { +namespace Frotz { + +void Processor::z_add() { + store((zword)((short)zargs[0] + (short)zargs[1])); +} + +void Processor::z_and() { + store((zword)(zargs[0] & zargs[1])); +} + +void Processor::z_art_shift() { + if ((short)zargs[1] > 0) + store((zword)((short)zargs[0] << (short)zargs[1])); + else + store((zword)((short)zargs[0] >> - (short)zargs[1])); +} + +void Processor::z_div() { + if (zargs[1] == 0) + runtimeError(ERR_DIV_ZERO); + + store((zword)((short)zargs[0] / (short)zargs[1])); +} + +void Processor::z_je() { + branch( + zargc > 1 && (zargs[0] == zargs[1] || ( + zargc > 2 && (zargs[0] == zargs[2] || ( + zargc > 3 && (zargs[0] == zargs[3]))))) + ); +} + +void Processor::z_jg() { + branch((short)zargs[0] > (short)zargs[1]); +} + +void Processor::z_jl() { + branch((short)zargs[0] < (short)zargs[1]); +} + +void Processor::z_jz() { + branch((short)zargs[0] == 0); +} + +void Processor::z_log_shift() { + if ((short)zargs[1] > 0) + store((zword)(zargs[0] << (short)zargs[1])); + else + store((zword)(zargs[0] >> - (short)zargs[1])); +} + +void Processor::z_mod() { + if (zargs[1] == 0) + runtimeError(ERR_DIV_ZERO); + + store((zword)((short)zargs[0] % (short)zargs[1])); +} + +void Processor::z_mul() { + store((zword)((short)zargs[0] * (short)zargs[1])); +} + +void Processor::z_not() { + store((zword)~zargs[0]); +} + +void Processor::z_or() { + store((zword)(zargs[0] | zargs[1])); +} + +void Processor::z_sub() { + store((zword)((short)zargs[0] - (short)zargs[1])); +} + +void Processor::z_test() { + branch((zargs[0] & zargs[1]) == zargs[1]); +} + +} // End of namespace Scott +} // End of namespace Gargoyle |